diff --git a/src/modules/zpool/zpool.c b/src/modules/zpool/zpool.c
index 9c02dfabe..7fc3b8c8d 100644
--- a/src/modules/zpool/zpool.c
+++ b/src/modules/zpool/zpool.c
@@ -223,5 +223,6 @@ FFModuleBaseInfo ffZpoolModuleInfo = {
         {"Size used percentage bar", "used-percentage-bar"},
         {"Size allocated percentage bar", "allocated-percentage-bar"},
         {"Fragmentation percentage bar", "fragmentation-percentage-bar"},
+        {"Is read-only", "is-readonly"},
     }))
 };